aspects of the transportation of explosive materials via railroad, water, highway, or air that pertain to safety, including security, and are regulated by the Department of Transportation or the Department of Homeland Security;

the use of explosive materials in medicines and medicinal agents in the forms prescribed by the official United States Pharmacopeia, or the National Formulary;

the transportation, shipment, receipt, or importation of explosive materials for delivery to any agency of the United States or to any State or political subdivision thereof;

small arms ammunition and components thereof;

commercially manufactured black powder in quantities not to exceed fifty pounds, percussion caps, safety and pyrotechnic fuses, quills, quick and slow matches, and friction primers, intended to be used solely for sporting, recreational, or cultural purposes in antique firearms as defined in section 921(a)(16) of title 18 of the United States Code, or in antique devices as exempted from the term “destructive device” in section 921(a)(4) of title 18 of the United States Code;